The Oventrop Regumat S-220 DN40 boiler connection group, Oventrop article number 1358252, is a pre-assembled unit designed for the efficient connection of a heat generator to a heating system. It features shut-off valves with integrated thermometers (0-120 °C), a 3-way mixing valve with bypass and actuator, and a high-efficiency Grundfos Magna3 32-100 circulation pump. The unit also includes a pipe section with a non-return valve, a wall bracket for easy installation, and EPP insulation for thermal efficiency. This robust assembly ensures reliable and optimized heating system operation, capable of handling a maximum operating temperature of 110 °C and a maximum operating pressure of 6 bar. The unit has a center distance of 220 mm for connections.